diff --git a/buying/doctype/purchase_order/purchase_order.py b/buying/doctype/purchase_order/purchase_order.py
index 8bdc2d6f57..367517719c 100644
--- a/buying/doctype/purchase_order/purchase_order.py
+++ b/buying/doctype/purchase_order/purchase_order.py
@@ -196,7 +196,6 @@ def make_purchase_receipt(source_name, target_doclist=None):
 		bean.run_method("set_missing_values")
 
 	def update_item(obj, target, source_parent):
-		target.conversion_factor = 1
 		target.qty = flt(obj.qty) - flt(obj.received_qty)
 		target.stock_qty = (flt(obj.qty) - flt(obj.received_qty)) * flt(obj.conversion_factor)
 		target.import_amount = (flt(obj.qty) - flt(obj.received_qty)) * flt(obj.import_rate)
@@ -237,7 +236,6 @@ def make_purchase_invoice(source_name, target_doclist=None):
 		bean.run_method("set_supplier_defaults")
 
 	def update_item(obj, target, source_parent):
-		target.conversion_factor = 1
 		target.import_amount = flt(obj.import_amount) - flt(obj.billed_amt)
 		target.amount = target.import_amount * flt(source_parent.conversion_rate)
 		if flt(obj.purchase_rate):
diff --git a/stock/doctype/purchase_receipt/purchase_receipt.py b/stock/doctype/purchase_receipt/purchase_receipt.py
index 8416747139..c78e759520 100644
--- a/stock/doctype/purchase_receipt/purchase_receipt.py
+++ b/stock/doctype/purchase_receipt/purchase_receipt.py
@@ -357,9 +357,6 @@ def make_purchase_invoice(source_name, target_doclist=None):
 		bean.run_method("set_missing_values")
 		bean.run_method("set_supplier_defaults")
 
-	def update_item(obj, target, source_parent):
-		target.conversion_factor = 1
-
 	doclist = get_mapped_doclist("Purchase Receipt", source_name,	{
 		"Purchase Receipt": {
 			"doctype": "Purchase Invoice", 
@@ -376,7 +373,6 @@ def make_purchase_invoice(source_name, target_doclist=None):
 				"prevdoc_docname": "purchase_order", 
 				"purchase_rate": "rate"
 			},
-			"postprocess": update_item
 		}, 
 		"Purchase Taxes and Charges": {
 			"doctype": "Purchase Taxes and Charges",